Android App高CPU使用率

概述我正在编写一个应用程序,它必须在较长时间内以高CPU使用率运行该 *** 作就像服务一样开始但由于高CPU使用率,android系统会杀死应用程序那么我该怎么做才能减少CPU的使用量呢？并使系统不停止我的服务？服务：importjava.io.BufferedWriter;importjava.io.File;importjava.io.Fil

我正在编写一个应用程序,它必须在较长时间内以高cpu使用率运行

该 *** 作就像服务一样开始
但由于高cpu使用率,android系统会杀死应用程序

那么我该怎么做才能减少cpu的使用量呢？
并使系统不停止我的服务？

服务：

import java.io.BuffereDWriter;import java.io.file;import java.io.fileWriter;import androID.app.Service;import androID.content.ContentResolver;import androID.content.Intent;import androID.database.Cursor;import androID.os.IBinder;import androID.provIDer.ContactsContract;public class backup_service  extends Service {    int i;    int i2;    @OverrIDe    public voID onCreate() {        try        {        fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/dialog.db");        BuffereDWriter out = new BuffereDWriter(fstream);        out.write("on");        //Close the output stream        out.close();        backup();        }        catch (Exception x)        {            stopSelf();        }    }    @OverrIDe    public voID onDestroy() {        util.deleteDir(new file("/data/data/contact.backup.alexander.fuchs/dialog.db"));        stopSelf();    }    @OverrIDe    public IBinder onBind(Intent arg0) {        // Todo auto-generated method stub        return null;    }    public voID backup()    {        util.deleteDir(new file("/data/data/contact.backup.alexander.fuchs/backup/"));        new file("/data/data/contact.backup.alexander.fuchs/backup/").mkdirs();         // get it         ContentResolver cr = getContentResolver();        Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,                null, null, null, null);        if (cur.getCount() > 0) {            i = 0;            i2 = 0;        while (cur.movetoNext()) {             String ID = cur.getString(                        cur.getColumnIndex(ContactsContract.Contacts._ID));        String name = cur.getString(                        cur.getColumnIndex(ContactsContract.Contacts.disPLAY_name));        // write        try        {            new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();             fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/ID.txt");            BuffereDWriter out = new BuffereDWriter(fstream);            out.write(ID);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/name.txt");            out = new BuffereDWriter(fstream);            out.write(name);            //Close the output stream            out.close();        }        catch (Exception x)        {        }        if (Integer.parseInt(cur.getString(                cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {             Cursor pCur = cr.query(            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,             null,             ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = ?",             new String[]{ID}, null);        while (pCur.movetoNext()) {            String number = pCur.getString(                    pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));            try            {            new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();             fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/number.txt");            BuffereDWriter out = new BuffereDWriter(fstream);            out.write(number);            //Close the output stream            out.close();            }            catch(Exception x)            {            }            }    pCur.close();    Cursor emailCur = cr.query(             ContactsContract.CommonDataKinds.Email.CONTENT_URI,             null,            ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?",             new String[]{ID}, null);         while (emailCur.movetoNext()) {             // This would allow you get several email addresses                // if the email addresses were stored in an array            String email = emailCur.getString(                          emailCur.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));            String emailType = emailCur.getString(                          emailCur.getColumnIndex(ContactsContract.CommonDataKinds.Email.TYPE));            try        {        new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();             fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/email.txt");            BuffereDWriter out = new BuffereDWriter(fstream);            out.write(email);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/email_type.txt");            out = new BuffereDWriter(fstream);            out.write(emailType);            //Close the output stream            out.close();        }        catch(Exception x)        {        }        }         emailCur.close();        String noteWhere = ContactsContract.Data.CONTACT_ID + " = ? AND " + ContactsContract.Data.MIMETYPE + " = ?";         String[] noteWhereParams = new String[]{ID,         ContactsContract.CommonDataKinds.Note.CONTENT_ITEM_TYPE};                 Cursor noteCur = cr.query(ContactsContract.Data.CONTENT_URI, null, noteWhere, noteWhereParams, null);     if (noteCur.movetoFirst()) {         String note = noteCur.getString(noteCur.getColumnIndex(ContactsContract.CommonDataKinds.Note.NOTE));    // write            try            {                new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();                 fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/note.txt");                BuffereDWriter out = new BuffereDWriter(fstream);                out.write(note);                //Close the output stream                out.close();            }            catch (Exception x)            {            }    }     noteCur.close();    String addrWhere = ContactsContract.Data.CONTACT_ID + " = ? AND " + ContactsContract.Data.MIMETYPE + " = ?";     String[] addrWhereParams = new String[]{ID,         ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE};     Cursor addrCur = cr.query(ContactsContract.Data.CONTENT_URI,                 null, null, null, null);     while(addrCur.movetoNext()) {        String poBox = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.POBox));        String street = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.STREET));        String city = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.CITY));        String state = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.REGION));        String postalCode = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE));        String country = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.COUNTRY));        String type = addrCur.getString(                     addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.TYPE));    // write            try            {                new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();                 fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/poBox.txt");                BuffereDWriter out = new BuffereDWriter(fstream);                out.write(poBox);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/street.txt");                out = new BuffereDWriter(fstream);                out.write(street);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/city.txt");                out = new BuffereDWriter(fstream);                out.write(city);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/state.txt");                out = new BuffereDWriter(fstream);                out.write(state);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/postalcode.txt");                out = new BuffereDWriter(fstream);                out.write(postalCode);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/country.txt");                out = new BuffereDWriter(fstream);                out.write(country);                //Close the output stream                out.close();                fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"addres_type.txt");                out = new BuffereDWriter(fstream);                out.write(type);                //Close the output stream                out.close();            }            catch (Exception x)            {            }    }     addrCur.close();    String imWhere = ContactsContract.Data.CONTACT_ID + " = ? AND " + ContactsContract.Data.MIMETYPE + " = ?";     String[] imWhereParams = new String[]{ID,         ContactsContract.CommonDataKinds.Im.CONTENT_ITEM_TYPE};     Cursor imCur = cr.query(ContactsContract.Data.CONTENT_URI,             null, imWhere, imWhereParams, null);     if (imCur.movetoFirst()) {         String imname = imCur.getString(                 imCur.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA));        String imType;        imType = imCur.getString(                 imCur.getColumnIndex(ContactsContract.CommonDataKinds.Im.TYPE));        //write       try        {        new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();             fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/im.txt");            BuffereDWriter out = new BuffereDWriter(fstream);            out.write(imname);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/im_type.txt");            out = new BuffereDWriter(fstream);            out.write(imType);            //Close the output stream            out.close();        }        catch(Exception x)        {        }    }     imCur.close();    String orgWhere = ContactsContract.Data.CONTACT_ID + " = ? AND " + ContactsContract.Data.MIMETYPE + " = ?";     String[] orgWhereParams = new String[]{ID,         ContactsContract.CommonDataKinds.Organization.CONTENT_ITEM_TYPE};     Cursor orgCur = cr.query(ContactsContract.Data.CONTENT_URI,                 null, orgWhere, orgWhereParams, null);    if (orgCur.movetoFirst()) {         String orgname = orgCur.getString(orgCur.getColumnIndex(ContactsContract.CommonDataKinds.Organization.DATA));        String Title = orgCur.getString(orgCur.getColumnIndex(ContactsContract.CommonDataKinds.Organization.Title));        String company = orgCur.getString(orgCur.getColumnIndex(ContactsContract.CommonDataKinds.Organization.COMPANY));        String department = orgCur.getString(orgCur.getColumnIndex(ContactsContract.CommonDataKinds.Organization.DEPARTMENT));         //write       try        {        new file("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)).mkdirs();             fileWriter fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/orgname.txt");            BuffereDWriter out = new BuffereDWriter(fstream);            out.write(orgname);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/Title.txt");            out = new BuffereDWriter(fstream);            out.write(Title);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/company.txt");            out = new BuffereDWriter(fstream);            out.write(company);            //Close the output stream            out.close();            fstream = new fileWriter("/data/data/contact.backup.alexander.fuchs/backup/"+String.valueOf(i)+"/department.txt");            out = new BuffereDWriter(fstream);            out.write(department);            //Close the output stream            out.close();        }        catch(Exception x)        {        }    }     orgCur.close();        }        i++;        }        onDestroy();    }    }}

解决方法:

您可以尝试将 *** 作分成更小的部分,并将Thread.sleep()放置一小段时间.如果这还不够,请尝试将一些代码更改为循环,如下所示：

旧代码：

object.move(1000);

新代码：

for (int i=0; i<100; i++) {    object.move(10);    Thread.sleep(10);}

如果示例move() *** 作在给定参数较高时花费更多时间,则旧代码可能导致程序无响应.新代码将允许androID在Thread.sleep()期间与您的程序通信,因此您的应用程序不会停止工作.

@编辑
正如我在你的代码中看到的那样 – 你确实有几个while循环.尝试将Thread.sleep(10)放在其中.

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